Alloy



Patented Mar. 22, 1932 UNITED STATES PATENT OFFICE HENRY F. SCHROEDER, OF MILWAUKEE, AND CHARLES D. RUSSELL, 0F SHEBOYGAN, WISCONSIN, ASSIGNORS TO RUSELITE CORPORATION, OF MILWAUKEE, WISCONSIN,

. ALLOY No Drawing.

This invention relates to improvements in the art of metallurgy, and more specifically to an alloy and mode of producing the same.

It is one of the objects of this invention to provide an improved alloy which posseses the desirable characteristics of high tensile strength, tenacity, and ductility, and which may be cast or Worked with or without the necessity of additional heat treatment to bring out the above mentioned properties.

A further object of this invention is to provide an improved alloy which is more resistant to corrosion than the present zinc alloys.

A further object of this invention is to produce an alloy Which is particularly adapted for use in automobile hardware, carburetor parts and the like.

\Vith the above and other objects in view, the invent-ion consists of the improved alloy and mode of producing the same, and all its parts and combinations, as set forth in-the claim, and all equivalents thereof.

The improved alloy, in its preferred form comprises a major portion of zinc, together with copper, aluminum, chromium, molybdenum and tantalum, the aluminum serving as a reducing element, the chromium serving as a corrosion resistant. the molybdenum as a hardener, and the tantalum as a strength ener. A small quantity of titanium may also be employed at a deoxidizer. The following tabulation discloses one combination of ingredients together with a desirable range of proportions for each of said ingredients.

melted to a bright red heat, a suitable flux being used to protect the aluminum from oxidation. Next, the tantalum, molybdenum, chromium and titanium are added, preferably in the order mentioned. After the mix- Application filed October 8, 1930. Serial No. 487,367.

ture has become thoroughly melted and after it has been stirred Well, the copper is added. When the latter ingredient has become thoroughly melted, a small quantity of zinc is added and the mixture is again stirred and poured into ingot molds. This forms a hardener, Which must be again melted using a suitable flux, to form the zinc alloy. When the hardener has become liquefied, the zinc is fed into the mixture, the latter being stirred Well until the zinc has become thoroughly mixed and melted. The mixture is then poured into ingot molds. If it is desired to form the complete alloy in the first instance, all of the zinc may be added during the original melting.

By utilizing the above method, and the ingredients recited in substantially the range of proportions set forth in the formula, a zinc alloy is formed which is of exceptionally high tensile strength and which possesses unusual ductility for an alloy of such strength. The alloy can be rolled, hammered, extruded, and die cast and is therefore suitable for a Wide range of uses. If desired, the alloy may be used With additional copper to produce an exceptionally strong brass.

lVhat We claim is:

An alloy comprisingapproximately 90% zinc, 5% copper, 3.50% aluminum, .5070 chromium, 12% molybdenum, and .159; tantalum, said alloy possessing high tensile strength, tenacity. and ductility.

In testimony whereof, we aflix our signatures.

HENRY F. SCHROEDER. CHARLES D. RUSSELL. 

